Update to Python 3.10 and Ubuntu 22.04

Removal of deprecated event loop
Updated pip requirements

Change-Id: I96a895d8f9fa8db89e6bbfd6f009d4f56deaa418
Signed-off-by: Mark Beierl <mark.beierl@canonical.com>
diff --git a/osm_mon/server/server.py b/osm_mon/server/server.py
index f05cdec..bb8f0e8 100755
--- a/osm_mon/server/server.py
+++ b/osm_mon/server/server.py
@@ -37,17 +37,14 @@
 
 
 class Server:
-    def __init__(self, config: Config, loop=None):
+    def __init__(self, config: Config):
         self.conf = config
-        if not loop:
-            loop = asyncio.get_event_loop()
-        self.loop = loop
         self.msg_bus = MessageBusClient(config)
         self.service = ServerService(config)
         self.service.populate_prometheus()
 
     def run(self):
-        self.loop.run_until_complete(self.start())
+        asyncio.run(self.start())
 
     async def start(self, wait_time=5):
         topics = ["alarm_request"]